Wrench.



No. 776,060. PATENTED' NOV. 29, 1904.

' G. L. HENDERSON.

WRENCH.

APPLIOATION FILED mm 2, 1903. N0 MODEL.

Un n l Patented November 29, 1904.

PATENT OEEIcE.

CHARLES LEWIS HENDERSON, OF BERLIN, CANADA.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 776,060, dated November29, 1904,,

Application filed June 2, 1903. Serial No. 159,785. (No model.)

To all whmn it may concern:

Be it known that LCHARLES Lewis HENDER- SON, machinist, of the town ofBerlin, in the county of Waterloo, in the Province of Ontario, Canada,have invented certain new and useful Improvements in Wrenches, of whichthe following is a specification.

My invention relates to improvements in wrenches patented to me in theDominion of Canada under No. 59,844 on the 4th day of May, 1898, and inthe United States of America under No. 618,571 on the 21st day ofJanuary, 1899; and the object of the present invention is to improve theconstruction of wrench so that it will be more durable and can bemanipulated without having any strain on the hand during the period thatthe wrench is being utilized and yet may, as formerly, be adjusted tofit the nut by the grippinghand alone; and it consists, essentially, ofan upper jaw and bar and a lower jaw and socketbar, steelgripping-pieces for the jaw suitably held in same, and the bar of theupper jaw being provided with a ratchet-shaped back, a compression-barpivoted on the lower jaw and U-shaped in cross-section and provided witha dogdesigned to engage with the ratchet-teeth on the bar of the outerjaw, a projection attached to the bar of the lower jaw at the grippingend thereof and provided with ratchet-teeth, and a handle pivoted on thegripping end of the compression-bar and provided with a dog designed toengage with the aforesaid ratchet-teeth on the projection duringutilization of the wrench, the parts being otherwise arranged andconstructed in detail, as hereinafter more particularly explained.

Figure 1 is a perspective view of a wrench constructed in accordancewith my invention. Fig. 2 is a longitudinal section of the wrench,showing the swinging handle at the rear end of the compression-barraised preparatory to adjusting the wrench and gripping the same foruse. Fig. 3 is a longitudinal section showing the handle down and thewrench adjusted ready for use. Fig. 4: is a cross-seetion on the line a1 Fig. 3. Fig. 5 is a longitudinal section through the lower portion ofthe jaws.

In the drawings like characters of reference indicate correspondingparts in each figure.

A is the upper bar, which is provided with an end jaw A. (t representsratchet-shaped teeth formed on the back of the upper bar, which isrecessed, as shown. B is the lower bar, which is provided with the endjaw B. The jaws A and B are preferably provided with steel gripping-jawsa and 7), having ratchet-shaped gripping edges, such jaws being at theinner side arc-shaped in form and fitting into corresponding recesses Aand B in the jaws A and B, respectively.

2 and 3 are pins which extend through the jaws A and B and thegripping-jaws e and I), and thereby securely hold them in place.

C is a straddle-bar, U-shaped in cross-section and provided withdepending lips c at the end near the jaw, through which and the bar Bextend the connecting-pins 0.

D is the dog, having a tail (Z. which normally holds it away from theinterior of the straddle-bar a suflicient distance to normally clear theratchet-teeth a.

d is a spiral spring extending between the dog I) and the top of thestraddle-bar and designed to hold such dog in its normal position.

It will be noticed that the bar B has a socket B attached to or formingpart of the same, and it is through a recess [1" in this socket that thebar A of the upper jaw extends.

E is a pin fitting into the lower bar B and extending upwardly into asocket E in the straddle-bar.

e is a spiral spring which encircles the pin E and socket E to normallyhold the compression-bar O up at the rear, and consequently the dog I)normally from engagement with the ratchet-teeth a of the bar A.

6 is an upwardly-extending projection provided with ratchet-teeth b anda stop 6.

C is a handle which is pivoted on a pin 0 at the rear end of thestraddle-bar O.

C isa dog pivoted ona pin 0" between jaws formed on the inner end of thehandle 0. The dog (J is provided with a projecting stop 0, which abuts aspiral spring 0, held in a recess in the handle G.

C is a spring encircling the pin and haw ing one end pressing againstthe free end of the straddle-bar C and the other end pressing againstthe inner end of the handle 0'. The spring 0 is a light spring and justsufiicient to raise the handle.

In order to fit the jaws upon the nut, it is necessary to draw out thejaw the requisite distance or slightly greater.

By pressing down repeatedly upon the handle C, so as to bring thestraddle-bar C clownwardly, the dog D will gradually feed the jaw Ainwardly until the end is securely gripped, and then by pressing thehandle C closed the dog C will become engaged with the ratchet b andthereby take the strain on the,

jaw 6 the only strain on the hand being the slight strain of the spring,which has a tendency to hold the handle C upwardly. The strain upon thejaw A will of course be taken by the dog D engaging with the ratchet a.It will thus be seen that I provide a simple means whereby the strain ofthe jaw may be relieved from the hand, and yet the wrench may bemanipulated every bit as readily as in my former applications.

What I claim as my invention is v 1. In a wrench, the combination withthe stationary jaw and bar and the movable jaw and bar provided with arecess at the back provided with ratchet-teeth, of the straddlebarprovided with a spring-actuated dog coacting with the ratchet-teeth onthe back of the movable jaw-bar, spring means for holding thestraddle-bar from the stationary jawbar, a projection attached to orforming part of the lower jar-bar, a handle pivoted in the end of thestraddle-bar, and means for engaging the inner end of the handle with aprojection, so as to take up the strain on the end of the straddle-baras and for the purpose specified.

2. In a wrench, the combination with the stationary jaw and bar and themovable jaw and bar provided with a recess at the back provided withratchet-teeth, of the straddlebar provided with a spring-actuated dogcoacting with the ratchet-teeth on the back of the movable jaw-bar,spring means for holding the straddle-bar from the stationary jawhar, aprojection provided with ratchet-teeth at the rear end thereof, a handlepivoted in the end of the straddle-bar, a spring designed to normallyhold the handle upwardly, a dog

